public class CustomView
extends View{
//路径和画笔
private Path
mPath;
private Paint
mPaint;
//记录屏幕的宽高
private int mScreenHeight;
private int mScreenWidth;
private int mOffset;
public CustomView(Context context) {
super(context);
init(context);
}
public CustomView(Context context,
@Nullable AttributeSet attrs) {
super(context, attrs);
init(context);
}
public CustomView(Context context,
@Nullable AttributeSet attrs,
int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context);
}
private void init(Context context) {
WindowManager win= (WindowManager) context.getSystemService(Context.
WINDOW_SERVICE);
DisplayMetrics displayMetrics =
new DisplayMetrics();
win.getDefaultDisplay().getMetrics(displayMetrics);
mScreenHeight = displayMetrics.
heightPixels;
mScreenWidth=displayMetrics.
widthPixels;
mPath=
new Path();
mPaint=
new Paint(Paint.
ANTI_ALIAS_FLAG);
mPaint.setColor(Color.
BLUE);
mPaint.setStyle(Paint.Style.
FILL);
mPaint.setStrokeWidth(
8);
setViewanimator();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
mPath.reset();
mPath.moveTo(-
mScreenWidth+
mOffset,
mScreenHeight/
2);
for (
int i=
0;i<
2;i++){
mPath.quadTo(-
mScreenWidth*
3/
4+(
mScreenWidth*i)+
mOffset,
mScreenHeight /
2 -
100, -
mScreenWidth /
2 + (
mScreenWidth * i) +
mOffset,
mScreenHeight /
2);
mPath.quadTo(-
mScreenWidth /
4 + (
mScreenWidth * i) +
mOffset,
mScreenHeight /
2 +
100, +(
mScreenWidth * i) +
mOffset,
mScreenHeight /
2);
}
mPath.lineTo(
mScreenWidth,
mScreenHeight);
mPath.lineTo(
0,
mScreenHeight);
canvas.drawPath(
mPath,
mPaint);
}
private void setViewanimator() {
ValueAnimator valueAnimator = ValueAnimator.
ofInt(
0,
mScreenWidth);
valueAnimator.setDuration(
1200);
valueAnimator.setRepeatCount(ValueAnimator.
INFINITE);
valueAnimator.setInterpolator(
new LinearInterpolator());
valueAnimator.addUpdateListener(
new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
mOffset= (
int) valueAnimator.getAnimatedValue();
invalidate();
}
});
valueAnimator.start();
